华中科技大学学报（自然科学版）2016，Vol.44Issue(8)：85-88,4.DOI:10.13245/j.hust.160818
基于 EMD 的破碎波检测与抑制
Breaking wave detection and processing based on spectral characteristics of microwave Doppler radars and EMD
摘要
Abstract
Microwave Doppler radar take use of backscatter from ocean surface to get ocean informa‐tion .Breaking waves will interfere radar echo and lead to decrease of radar measurement accuracy .In this paper ,threshold was set to detect breaking waves ,and the location that waves break was gotten , with the characteristics that amplitude and Doppler frequency of sea clutter Doppler spectrum signifi‐cantly enhanced when waves break .Processing data that influenced by breaking waves were processed by the way of EMD (empirical mode decomposition ) to eliminate error caused by breaking waves . Processing of measured data shows that the detection results are consistent with the fact ,and the EMD processing algorithm reduces the error in center frequency estimation and improves the accuracy of inversion algorithm .T he effectiveness of this algorithm is verified by measured data .关键词
海洋回波/多普勒谱/破碎波/检测/经验模态分解Key words
sea clutter/Doppler spectrum/breaking wave/detection/EMD (empirical mode decom-position)分类
信息技术与安全科学引用本文复制引用
陈泽宗,易盛,赵晨,陈曦..基于 EMD 的破碎波检测与抑制[J].华中科技大学学报（自然科学版）,2016,44(8):85-88,4.基金项目
国家自然科学基金资助项目（41376182）；湖北省科技支撑计划资助项目（2014BEC057）；中央高校基本科研业务费专项资金资助项目（2042014kf0028）；国家海洋局数字海洋科学技术重点实验室开放基金资助项目（KLD0201401）． （）
